allow constructing DynamicVector for data

also add default constructor and accessor

opm/parser/eclipse/EclipseState/Schedule/DynamicVector.hpp

@@ -37,10 +37,16 @@ namespace Opm {
     template <class T>
     class DynamicVector {
     public:
+        DynamicVector() = default;
+
         DynamicVector(const TimeMap& timeMap, T defaultValue) :
             m_data( timeMap.size(), defaultValue )
         {}
 
+        explicit DynamicVector(const std::vector<T>& data) :
+            m_data(data)
+        {}
+
         const T& operator[](size_t index) const {
             return this->m_data.at( index );
         }
@@ -58,6 +64,10 @@ namespace Opm {
             (*this)[index] = std::move( value );
         }
 
+        const std::vector<T>& data() const {
+            return m_data;
+        }
+
     private:
         std::vector<T> m_data;
     };